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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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ARG-US Remote Monitoring Systems: Use Cases and Applications in Nuclear Facilities and During Transportation
As highlighted in the Spring 2024 issue of Radwaste Solutions, researchers at the Department of Energy’s Argonne National Laboratory are developing and deploying ARG-US—meaning “Watchful Guardian”—remote monitoring systems technologies to enhance the safety, security, and safeguards (3S) of packages of nuclear and other radioactive material during storage, transportation, and disposal.
Wasim Raza, Kwang-Yong Kim
Nuclear Science and Engineering | Volume 161 | Number 2 | February 2009 | Pages 245-254
Technical Note | doi.org/10.13182/NSE161-245
Articles are hosted by Taylor and Francis Online.
In this work multiobjective shape optimization of a 19-pin wire-wrapped fuel assembly is carried out using a hybrid multiobjective evolutionary approach in order to achieve an acceptable compromise between two competing objectives, i.e., enhancement of heat transfer and reduction of friction loss. Two nondimensional variables, wire-spacer diameter to fuel rod diameter ratio and wire-wrap pitch to fuel rod diameter ratio, are chosen as design variables. The response surface approximation method is used to construct the surrogate with objective function values calculated by means of Reynolds-averaged Navier-Stokes analysis of the flow and heat transfer. The shear stress transport turbulence model is used as a turbulence closure. The optimization results are processed by the Pareto-optimal method. The Pareto-optimal solutions are obtained using a combination of the evolutionary algorithm NSGA-II and a local search method. The Pareto-optimal front for the wire-wrapped fuel assembly has been obtained. With an increase in the wire-spacer diameter, both heat transfer and friction loss in the assembly increase. The design with higher heat transfer on the Pareto-optimal curve shows not only a lower maximum temperature but also a more uniform temperature distribution on the cross section of the assembly in comparison with the other designs.